The oil flowing between the engine and the box: causes and elimination breakdowns

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2020-01-05 02:00:13

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The engine and gearbox of any car used oil. And no matter whether it is diesel car or petrol, automatic or mechanics. Often, after prolonged use, the oil loses its level. It can not only get into the combustion chamber, but also to leak into the seal areas. And not always flowing motor oil. Transmission is also not immune. What to do, leaking oil between engine and box? In today's article we will discuss in detail this question.

How lubricated engine and drivetrain

The engine and transmission use different types of oils. In the latter case, it is more viscous. Unlike a manual transmission, the engine and automatic transmission is lubricated by a forced-feed liquid. This is the function of the pump. why the oil flowingAs for the manual transmission, here the oil enters the teeth by sprinkling. Gear located in the transmission housing, scoops the liquid, and thus provides a lubrication of the teeth at their point of contact. Another feature – the regulation of the oil change. For internal combustion engines it is 8-10 thousand miles, and automatic transmission – 70. As for mechanics, on most machines it is maintenance-free. The oil is poured on the whole lifetime. But this does not mean that you can not check the level of residue. If leaking transmission fluid, oil starvation can cause excessive wear of the gear. In the end it will fail. When replacing do not need to pour above the norm. Excess fluid will simply flow from “weak” spots.

Motor or transmission?

Leaking oil between engine and TRANS, you need to determine what exactly the node it disappears. If it is a thick liquid, so she transmission, and the problem is in the transaxle. If the car for more than 10 years, you should check the crankshaft rear oil seal. Due to wear and constant vibrations it is squeezed out and passes oil. You can also check the ventilation of the crankcase. This can be brought to pre-remove the nozzle piece of paper. If the engine speed is over 1 thousand years, he does not bend, the system is clogged. In this case there is increased pressure in the engine lubrication system and the liquid begins to flow, as they say, with all the cracks. The weak point is the junction with the gearbox. In the transmission too, has its own ventilation. oil leak between engine and gearbox VAZIt is through the breather. If it is clogged, the pressure inside increases, and there is a oil leak between the engine box. VAZ-2110 is no exception. The decision – cleaning the air vents and replace seal. When you install the latest recommended supply, and second, regardless of status, as its resource is also limited.

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Banal reasons

Why flowing oil in the box? The reasons may be trivial. flowing oil between engine and TRANSIt is poorly tightened drain plug or the removed sensors. Sometimes a leak occurs because of a loosely twisted probe. Here the location of the leak can be seen without dismantling the box and eliminate on the spot. But what to do if these details are tight, but still leaking oil between engine and TRANS? Will be discussed further.

Serious fault

There are a number of causes of an oil leak which require disassembly of the box. First – breakdown of gaskets and other sealing elements. It can also be the oil seal. But if in the case of the engine is the crankshaft, the transmission flows to the sealing element of the primary shaft. Why is still leaking oil between engine and box? This problem occurs when the violation of the geometry of the pallet. It often happens when hitting a large hole or other obstacle. manual transmission repairIn the end, the pan hits the box and deformed. If it is automatic transmission, the reason is the failure of “donut” (Converter) or a faulty oil pump. The box itself comes up in emergency mode. The car only runs in 3rd gear.

About additives

Now in the automotive world, a host of additives. And some car owners, when deciding on how to resolve oil leaks, running to the stores for “miraculous” doped. Pour it in the engine or box (and often here and there) and wait for the effect. But as practice shows, any results it makes. The additive is not able to eliminate mechanical damage to the tray, “seal” has broken his seal and restore the embossed seal. The problem does not leave the owner. The only thing that can reduce the effects of leaks, – this thickening of the oil. Thus, you intentionally change its characteristics. how to repair oil leakBut it is very harmful for the engine and transmission, and the leak is not 100 percent eliminated. Therefore, you need to repair the gearbox, change the gaskets and seals. Reviews of car owners do not confirm the effectiveness of the additives.

How to change the rear oil seal?

This Procedure is quite complicated, as the item is for the clutch system. If it is a rear wheel drive car, removed the driveshaft. Then, as is front-wheel drive, -box, clutch Assembly with basket and wheels and the engine flywheel. The rear oil seal is mounted in the housing and mounted on the eight bolts. After twisting, take out the housing and press-fitted the new element. If you encounter difficulties during installation, you can use a rubber mallet or a regular steel, using a soft pad. The latter can be done from a piece of old inner tube. Further, all elements are collected in reverse order.

Front

It is much easier to change than the rear. The element is located at the end of the crankshaft (in vehicles with a transverse engine – near the right rack). For replacement, we will need to remove the cover of the timing belt and put the piston of the first cylinder at TDC. Relax the tensioner and remove out the timing belt and alternator, after removing the pulley. Drain the engine oil. Dismantle the crankshaft pulley. Unscrew the oil pump. Inside it will be pressed on the seal. Extract it by using a minus screwdriver. New press with the big head (27 and above) or on a special machine. Further, the Assembly – in reverse order.

About the selection of seals for transmission

When buying you need to consider, what kind of oil is in the box you will shed in the future. leaking transmission fluidThere are oil seals with different elasticity – under mineral and synthetic products. If you pour the wrong oil in the box, the item will crack. Usually it happens with “synthetic”. It has good flushing properties. Note that for automatic transmissions there is a separate range of oils with a certain viscosity. Their properties differ significantly from the fluids for a manual transmission.

Keep the engine clean

After replacing all the items you need to make an external wash of the engine. So you eliminate the former locations of an oil leak and you will know some of the places it will flow in the event of a fault. The wash motor and the box should be done every two years. Don't be afraid to aim the water spray on the engine. The only – ensure the integrity of the elements of the plug. This coil, distributor, spark plugs and high tension leads. They moisture is highly undesirable.

Summary

Thus, if there was a leak between the frame and the engine, you should not postpone the repair. Manual transmission or automatic doesn't matter. Driving with low oil level the same kills these boxes, not to mention the engine itself. Well monitor daily the level podleta under the bottom and pulling the dipstick (if it's a box), is crazy. With a one-time financial investment in repairs you will forget about the leak for a few years. And remember that with the use of thickeners in oil you do not solve the problem, just hide it. oil in a boxFollow the streaks of the car when it is parked. The presence of oily drops under the bottom – the first sign that you have the oil flowing between the engine and transmission.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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